Vulcan/packages/vulcan-forms/lib/components/FormNestedItem.jsx

import React from 'react';
import PropTypes from 'prop-types';
import { Components, registerComponent } from 'meteor/vulcan:core';
import mergeWithComponents from '../modules/mergeWithComponents';

const FormNestedItemLayout = ({ content, removeButton }) => (
  <div className="form-nested-item">
    <div className="form-nested-item-inner">{content}</div>
    {removeButton && [
      <div key="remove-button" className="form-nested-item-remove">
        {removeButton}
      </div>,
      <div
        key="remove-button-overlay"
        className="form-nested-item-deleted-overlay"
      />
    ]}
  </div>
);
FormNestedItemLayout.propTypes = {
  content: PropTypes.node.isRequired,
  removeButton: PropTypes.node
};
registerComponent({
  name: 'FormNestedItemLayout',
  component: FormNestedItemLayout
});

const FormNestedItem = (
  { nestedFields, name, path, removeItem, itemIndex, formComponents, hideRemove, ...props },
  { errors }
) => {
  const FormComponents = mergeWithComponents(formComponents);
  const isArray = typeof itemIndex !== 'undefined';
  return (
    <FormComponents.FormNestedItemLayout
      content={nestedFields.map((field, i) => {
        return (
          <FormComponents.FormComponent
            key={i}
            {...props}
            {...field}
            path={`${path}.${field.name}`}
            itemIndex={itemIndex}
          />
        );
      })}
      removeButton={
        isArray && !hideRemove && [
          <div key="remove-button" className="form-nested-item-remove">
            <Components.Button
              className="form-nested-button"
              variant="danger"
              size="small"
              iconButton
              tabIndex="-1"
              onClick={() => {
                removeItem(name);
              }}
            >
              <Components.IconRemove height={12} width={12} />
            </Components.Button>
          </div>,
          <div
            key="remove-button-overlay"
            className="form-nested-item-deleted-overlay"
          />
        ]
      }
    />
  );
};

FormNestedItem.propTypes = {
  path: PropTypes.string.isRequired,
  itemIndex: PropTypes.number,
  formComponents: PropTypes.object
};

FormNestedItem.contextTypes = {
  errors: PropTypes.array
};

registerComponent('FormNestedItem', FormNestedItem);